diff --git a/index.js b/index.js
index 4ea95c84..395f4ab0 100644
--- a/index.js
+++ b/index.js
@@ -13,9 +13,10 @@ const isObj = o => o !== null && 'object' === typeof o && !Array.isArray(o)
 const isNonEmptyString = str => 'string' === typeof str && str.length > 0
 
 const createClient = (profile, request = _request) => {
-	profile = Object.assign({}, defaultProfile, profile)
-	profile.parseProducts = createParseBitmask(profile)
-	profile.formatProductsFilter = createFormatProductsFilter(profile)
+	profile = Object.assign({
+		parseProducts: createParseBitmask(profile),
+		formatProductsFilter: createFormatProductsFilter(profile)
+	}, defaultProfile, profile)
 	validateProfile(profile)
 
 	const departures = (station, opt = {}) => {